User`s guide
Table Of Contents
- Overview
- Getting Started
- System Setting
- Making Measurements
- Measuring Multiple Signals
- Measuring a Low-Level Signal
- Improving Frequency Resolution and Accuracy
- Making Distortion Measurements
- One-button Power Measurement
- Making a Stimulus Response Transmission Measurement
- Measuring Stop Band Attenuation of a Low-pass Filter
- Making a Reflection Calibration Measurement
- Measuring Return Loss Using the Reflection Calibration Routine
- Making an Average Power Measurement
- Key Reference
- SCPI Command Reference
- Error Messages
- Menu Map
5Key Reference
90 N9340A User’s Guide
As the video bandwidth is decreased, the sweep
time is increased to maintain amplitude calibration.
A “#”mark appears next to RBW on the display
when it is not coupled.
Key access: [BW/SWP]
VBW/RBW
Key access: [BW/SWP] > {VBW/RBW}
Selects the ratio between the video and resolution
bandwidths.
If signal responses near the noise level are visually
masked by the noise, the ratio can be set to less
than 1 to lower the noise. The knob and step keys
change the ratio in a 1, 3, 10 sequence.
Avg Type
Key access: [BW/SWP] > {Avg Type}
Accesses the functions to automatically or
manually choose from one of the following
averaging type:
Log Pwr
Key access: [BW/SWP] > {Avg Type} > {Log Pwr}
Averages the data as appropriate for the
logarithmic scaled
y- axis.
When the average type is set to Log Pwr, “LgAv”
appears on the left side of the display.
NOTE
When preset is set to default, or VBW/RBW is set to Auto,
the ratio is set to 1.